CVE-2022-0216Public exploit

Host emulator crash via repeated SCSI cancels

Published Aug 26, 2022 · Updated Aug 2, 2024

Use-after-free in QEMU allows guest OS users to crash the host emulator through repeated LSI SCSI request cancellations. In lsi_do_msgout, cancelling a request frees s->current while the local current_req pointer remains reusable, so a second cancel dereferences freed memory. Exploitation requires the emulated LSI53C810 controller and high privileges inside the guest; the demonstrated outcome is termination of the QEMU host process, not code execution.

CVSS severity4.4
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in QEMU allows guest OS users to crash the host emulator through repeated LSI SCSI request cancellations. In lsi_do_msgout, cancelling a request frees s->current while the local current_req pointer remains reusable, so a second cancel dereferences freed memory. Exploitation requires the emulated LSI53C810 controller and high privileges inside the guest; the demonstrated outcome is termination of the QEMU host process, not code execution.

The record

CVE
CVE-2022-0216
Published
Aug 26, 2022
Updated
Aug 2, 2024
Vendor
QEMU Project
Product
QEMU
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 26, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Affects QEMU < v6.0.0, Fixed in v7.1.0-rc0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

QEMU Project · QEMUversion=Affects QEMU < v6.0.0, Fixed in v7.1.0-rc0

Published CVSS scores

4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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